A new Request for Comments is now available in online RFC libraries.
RFC 5712
Title: MPLS Traffic Engineering Soft Preemption
Author: M. Meyer, Ed.,
JP. Vasseur, Ed.
Status: Standards Track
Date: January 2010
Mailbox: matthew.meyer at bt.com,
jpv at cisco.com
Pages: 13
Characters: 27371
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-mpls-soft-preemption-18.txt
URL: http://www.rfc-editor.org/rfc/rfc5712.txt
This document specifies Multiprotocol Label Switching (MPLS) Traffic
Engineering Soft Preemption, a suite of protocol modifications
extending the concept of preemption with the goal of reducing or
eliminating traffic disruption of preempted Traffic Engineering Label
Switched Paths (TE LSPs). Initially, MPLS RSVP-TE was defined with
support for only immediate TE LSP displacement upon preemption. The
utilization of a reroute request notification helps more gracefully
mitigate the reroute process of preempted TE LSP. For the brief
period soft preemption is activated, reservations (though not
necessarily traffic levels) are in effect under-provisioned until the
TE LSP(s) can be rerouted. For this reason, the feature is
primarily, but not exclusively, interesting in MPLS-enabled IP
networks with Differentiated Services and Traffic Engineering
capabilities. [STANDARDS TRACK]
This document is a product of the Multiprotocol Label Switching Working Group of the IETF.
This is now a Proposed Standard Protocol.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements. Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
status of this protocol. Distribution of this memo is unlimited.
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